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Salmonella detection and critical control point determination during poultry processing
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Several alternative sampling methods have been recently evaluated for detection of Salmonella on broiler carcasses during commercial processing. The present study evaluated and compared four sampling techniques: carcass rinse, vent skin flap sampling, thoracic skin flap sampling, and the FSIS approved sponge method in a turkey processing plant. Carcass rinse was consistently and significantly superior to tested alternatives for the detection of Salmonella in this plant. Salmonella recovery using the carcass rinse technique on split flocks at the re-hang area from 2 different scald systems suggested that countercurrent water flow improved the microbiological quality when temperatures were similar. However, elevations of the concurrent scald tank temperature eliminated the apparent benefit of directional flow. In contrast to most previously-reported observations in broiler processing plants, overall Salmonella recovery did not increase during processing and a significantly (P < 0.05) lower overall recovery incidence from 4 flocks was observed immediately pre-chill as compared to post-feather removal. Also in contrast to previously-reported data from broiler processing plants, overall Salmonella recovery incidence in the turkey ceca was significantly (P < 0.05) higher than in the crop in 9 flocks evaluated. These data suggest that microbiological investigations to determine plant-specific critical control points in turkey plants are warranted prior to implementation of intervention strategies. After evaluation of turkey processing, we evaluated broiler carcasses in a commercial broiler processing plant for Salmonella incidence on carcasses that had been passed or retained by the Food Safety Inspection Service (FSIS) with regard to visible fecal or ingesta contamination. Contaminated and non-contaminated carcasses were removed from the processing line at the site of FSIS inspection (pre-immersion chilling) and subjected to the carcass rinse sampling procedure for Salmonella incidence recovery. Broiler flocks were evaluated over a 2 day period. Although a numerical association of increasing Salmonella recovery with visible contamination was observed, no significant (P < 0.05) differences in Salmonella recovery incidence were identified in any single flock or combined data when evaluated. These data suggest that focus on organoleptic parameters of inspection may result in disappointing microbiologic improvements in broiler carcass quality.
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Includes bibliographical references (leaves 31-35).
Issued also on microfiche from Lange Micrographics.
Young, Suzanne D. (2000). Salmonella detection and critical control point determination during poultry processing. Master's thesis, Texas A&M University. Available electronically from
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